Attic insulation.....


Old 10-31-05, 04:25 PM
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Attic insulation.....

How important is a vapor barrior in the attic?I plan on adding insulation the the existing blown/batt insulation.There is no vapor barrior at all.Should I remove exsisting insulation and put some down with a vapor barrior.Its been like this for about 18+ years.I live in South Carolina if that makes a difference.
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Old 11-01-05, 07:01 AM
Join Date: Jul 2005
Location: USA
Posts: 124
According to everyone here, it is important. I had to paint my ceilings with an oil-based primer and then with standard ceiling white, because I couldn't get underneath my walk-up attic.

Still, I noticed how much moisture still gets into the attic on a hot summer day, even with a vapour barrier. When I was ripping off old cedar shakes underneath an asphalt shingle layer in July, they were not only broiling hot, but also soaked damp with vapour. It was amazing.


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